undefined SaucelabsReporter adapters causes single-run=false to fail

[drzraf]

This is probably a follow-up of #87

With start --single-run=false, I'm getting:

16 09 2020 11:35:38.234:WARN [karma]: Error during refresh file list. TypeError: Cannot read property 'push' of undefined
    at _reporters.forEach (/x/node_modules/karma/lib/reporters/multi.js:11:61)
    at Array.forEach (<anonymous>)
    at MultiReporter.addAdapter (/x/node_modules/karma/lib/reporters/multi.js:11:21)
    at Server.<anonymous> (/x/node_modules/karma/lib/middleware/runner.js:97:18)
    at Object.onceWrapper (events.js:286:20)
    at Server.emit (events.js:203:15)
    at Server.EventEmitter.emit (domain.js:448:20)
    at Executor.schedule (/x/node_modules/karma/lib/executor.js:31:20)
    at refreshFileList.then (/x/node_modules/karma/lib/middleware/runner.js:42:18)

More specifically, within multi.js, during the loop, once it encounter the SaucelabsReporter and attempt to add an Adapter to the existing ones. But apparently, contrary to other reporters, this SaucelabsReporter contains no existing adapters (undefined) what provoke a failure when start --single-run=false is used with reporters: ['saucelabs']

Sounds like 9a5a147 fixed it but was lost at #156 (6525ddd4f) (@devversion )

[karmarunnerbot]

:tada: This issue has been resolved in version 4.3.1 :tada:

The release is available on:

• GitHub release
• npm package (@latest dist-tag)

Your semantic-release bot :package::rocket: